Patents by Inventor Rudolph G. Berg

Rudolph G. Berg has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Preparation of citraconic anhydride
    Patent number: 4100179
    Abstract: The preparation of citraconic anhydride by continuous vapor phase oxidation of mesityl oxide, isomesityl oxide or mixtures thereof is disclosed.
    Type: Grant
    Filed: January 7, 1977
    Date of Patent: July 11, 1978
    Assignee: Pfizer Inc.
    Inventors: Rudolph G. Berg, Donald S. Hetzel
  • Preparation of citraconic acid
    Patent number: 3960901
    Abstract: High purity citraconic acid is prepared in good yield by the thermolysis, in the presence of a catalyst, of citramalic acid, 3-methylmalic acid, paraconic acid, mesaconic acid and mixtures thereof.
    Type: Grant
    Filed: April 7, 1975
    Date of Patent: June 1, 1976
    Assignee: Pfizer Inc.
    Inventor: Rudolph G. Berg
  • Citraconic anhydride process
    Patent number: 3932469
    Abstract: The preparation of citraconic anhydride by catalytic vapor phase oxidation of methyl butanols and methyl butenols.
    Type: Grant
    Filed: June 3, 1974
    Date of Patent: January 13, 1976
    Assignee: Pfizer Inc.
    Inventors: Rudolph G. Berg, Bryce E. Tate